The incidence of Clostridium perfringens in 95 ground beef samples obtained from a retail store in Denver, Colorado was 47.4%. Although viability was not reduced after 24 h at −20 C, greater than 90% of the organisms usually could not be detected after frozen storage over a 4-month period.
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Copyright © 1974, International Association of Milk, Food, and Environmental Sanitarians
1974
